The velocity of the horse is 0 m/s, so the correct option is C.
The velocity is a vector that is given by the rate of change of the displacement.
[tex] v = \frac{d}{t} [/tex]
Where:
d: is the displacement
t: is the time
Since in the horse track the starting point and the finish line are at the same point, the velocity of the horse is zero because the velocity depends on the direction of the displacement, and here the displacement is zero (the horse returns to the starting point).
Therefore, the correct option is C: 0 m/s.
You can learn more about velocity here:
I hope it helps you!
